3 replies to this topic

[chemengstudent1996]

Hi, I  am designing a multi-tubular packed bed reactor like a shell and tube heat exchanger. Do I need to model the reactor according to TEMA standards. For example, do I need to follow the constraint of 5<L/D<10 and maximum shell diameter of 2540mm ?

[Bobby Strain]

Why not?

 

Bobby

[latexman]

What’s the MAWP and MAWT of the shell and tube side? If it falls under the jurisdiction of your local pressure vessel Code, it must meet that pressure vessel Code. If dimensionally it falls outside of TEMA, so what? It still must meet your pressure vessel Code.

[Pilesar]

TEMA standards are an easy way for exchanger manufacturers and exchanger purchasers to understand what is being sold. The standards make it simpler for vendors to bid and for the purchaser to compare bids between vendors. Different specifications other than those conforming to the TEMA norms can be agreed upon by both buyer and seller. Those 'exception' specifications are noted in the contract. Heat exchangers built with 'exceptions' may suit the purposes of the buyer better than conforming to TEMA standards. The buyer can ask for equipment to be manufactured according to any specifications desired. TEMA does not mention packed bed reactors and is not intended to guide design of packed bed reactors.